linux-kernel - Re: Threaded irq handler question

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Message-ID: <20100422013721.GC8938@windriver.com>
Date:	Thu, 22 Apr 2010 09:37:21 +0800
From:	Yong Zhang <yong.zhang@...driver.com>
To:	Will Newton <will.newton@...il.com>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: Threaded irq handler question

On Wed, Apr 21, 2010 at 05:35:32PM +0100, Will Newton wrote:
> Hi all,
> My problem is that this structure does not work, because once I call
> disable_irq_nosync() on the irq in the check handler the thread will
> no longer run because the irq is disabled. However if I don't call
> disable_irq_nosync() I will get endless irqs because the line is
> level-triggered and will not be deasserted until the thread has run.
> 
> Could someone tell me what I'm doing wrong here?

Does IRQF_ONESHOT meet your need?

Thanks,
Yong
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